Claude Opus 5 vs GPT-5.6 Sol
Anthropic against OpenAI, costed on the same three workloads. GPT-5.6 Sol is cheaper on all three workloads.
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Monthly bill, side by side
| Workload | Claude Opus 5 | GPT-5.6 Sol | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$20,138 | $16,110 | $4,028 (+25%) |
| Document summarizer 1,000 single-shot summaries a day |
$2,430 | $1,944 | $486 (+25%) |
| Coding agent 200 twelve-turn sessions a day |
$14,040 | $11,232 | $2,808 (+25%) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Claude Opus 5 | GPT-5.6 Sol | |
|---|---|---|
| Input, per 1M tokens | $5 | $4 (Promotional rate until 2026-11-21 — standard rate $5/M) |
| Output, per 1M tokens | $25 | $20 (Promotional rate until 2026-11-21 — standard rate $30/M) |
| Cached input | $0.5 | $0.4 (Promotional rate until 2026-11-21 — standard rate $0.5/M) |
| Context window | 1M | 922K |
| Maximum output | 128K | 128K |
| Reasoning model | yes | yes |
| Vision | yes | yes |
Beyond the price
- Claude Opus 5 reads up to 1M tokens of context in one request; GPT-5.6 Sol stops at 922K.
Run this comparison on your own numbers
Full detail: Claude Opus 5 pricing · GPT-5.6 Sol pricing
More comparisons
Other head-to-heads that include Claude Opus 5 or GPT-5.6 Sol.
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- Claude Opus 5 vs Gemini 4 Argon
- Claude Opus 5 vs GPT-5.5
- GPT-5.6 Sol vs Claude Fable 5
- GPT-5.6 Sol vs Claude Opus 4.7
- GPT-5.6 Sol vs Claude Opus 4.8
Common questions
Which is cheaper, Claude Opus 5 or GPT-5.6 Sol?
GPT-5.6 Sol is cheaper on all three workloads.
How much would Claude Opus 5 and GPT-5.6 Sol cost each month?
On PromptSpend's standard workloads, per month: support chatbot: Claude Opus 5 $20,138, GPT-5.6 Sol $16,110 (GPT-5.6 Sol is cheaper by $4,028); document summarizer: Claude Opus 5 $2,430, GPT-5.6 Sol $1,944 (GPT-5.6 Sol is cheaper by $486); coding agent: Claude Opus 5 $14,040, GPT-5.6 Sol $11,232 (GPT-5.6 Sol is cheaper by $2,808). No prompt caching and no batch discount is assumed.
How do Claude Opus 5 and GPT-5.6 Sol differ apart from price?
Claude Opus 5 reads up to 1M tokens of context in one request; GPT-5.6 Sol stops at 922K.